STARTUP
When the OPECL is installed and wired as described in
the “Installation” section, it is ready for commissioning.
If the application requires that specific changes be
made to the factory settings, HART communication will
be required.
NOTE
Ensure that alarm devices are bypassed during
commissioning.
ALIGNMENT
OVERVIEW
The OPECL modules must be properly aligned before
normal operation will be attained. Alignment consists of
a basic alignment stage and a fine alignment stage:
1.
Basic Alignment Procedure
. This procedure
requires the Telescope Alignment Kit p/n 009104-
001. It does not require a handheld HART Field
communicator.
2.
Fine Alignment Procedure
. This procedure
requires a handheld HART Field Communicator with
the OPECL Device Descriptor (DD) software driver
such as the Emerson Model 375 Field
Communicator (refer to Appendix A). The fine
alignment procedure is required whenever maximum
optical signal strength is required.
NOTE
Basic alignment must be successfully completed
before attempting Fine alignment.
BASIC ALIGNMENT PROCEDURE
Equipment Required
1. Properly installed and powered OPECL system
(transmitter and receiver). Easy access to both
modules is highly recommended.
2. Telescope Alignment Tool p/n 009104-001. The
telescope alignment tool is recommended for use in
commissioning all OPECL systems. The following
instructions cover the use of the Telescope
Alignment Tool.
3. Calibration Magnet.
4. For installations with module separation distances
between 5 and 30 meters, a range reduction
aperture kit is required. Refer to the “Ordering
Information” section of this manual for part number.
See form number 95-8580 for installation
instructions.
Remove operating power from the OPECL Transmitter,
and then complete the following steps:
1. Ensure that both system modules are installed and
wired properly on their respective mounting
plate/post assemblies at a separation distance
within the specified range. Bypass all external gas
alarm devices that are connected to the receiver
outputs.
2. Ensure that the system modules are installed with
their windows at approximately the same height
above grade. Each module should be roughly
aligned to face in the direction of the other module.
3. Ensure that system modules are securely fixed to the
support structure.
4. Loosen the locking nuts on the alignment adjuster
bolts so that the bolts can be freely tightened or
loosened for alignment purposes. Loosen, then
hand-snug the two vertical alignment locking nuts.
See Figure 17. At this point, the unit should be
easily adjustable in the vertical and horizontal
positions with little or no adjustment slop.
5. Hand-tighten all four adjustment bolts until the
alignment plate is stabilized.
6. Loosen the sun shade assembly and slide it toward
the rear of the transmitter module.
16
95-8556
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